'duedate' => [ qw(a.duedate a.invnumber) ],
'dunning_date' => [ qw(dunning_date a.invnumber) ],
'dunning_duedate' => [ qw(dunning_duedate a.invnumber) ],
+ 'salesman' => [ qw(salesman) ],
);
my $sortdir = !defined $form->{sortdir} ? 'ASC' : $form->{sortdir} ? 'ASC' : 'DESC';